I want to implement in-app purchase for my html5 game. When I check whether payments is available for my game or not, the "getSupportedAPIs" doesn't return "payments.purchaseAsync" neither in my local nor in dashboard test . (both on android device that Facebook app installed and logined too)

as document said :

Check whether payments is available for the session; use getSupportedAPIs and look for payments.purchaseAsync.

is there something that I'm missing ? I'm googling too but can't find proper answer I'm also define my purchase items in the dashboard.Dashboard in-app purchase screenshot